package Exercise2;

import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class TCPTest1 {
    @Test
    public void client()
    {
        Socket socket = null;
        OutputStream os = null;
        try {
            //1.创建Socket对象，指明服务器端的IP和端口号
            InetAddress inet = InetAddress.getByName("127.0.0.1");
            socket = new Socket(inet,8899);
            //2.获取一个输出流，用于输出数据
            os = socket.getOutputStream();
            //3.写出数据的操作
            os.write("你好，我是客户端mm".getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //4.资源的关闭
            if(os!=null)
            {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(socket!=null)
            {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    //服务端
    @Test
    public void server(){
        ServerSocket socket = null;
        Socket accept = null;
        InputStream inputStream = null;
        try {
            //1.创建服务器端的ServerSocket，指明自己的端口号
            socket = new ServerSocket(8899);
            //2.调用accept()表示接收来自客户端的socket
            accept = socket.accept();
            //3.获取输入流
            inputStream = accept.getInputStream();
            //4.读取输入流中的数据
            byte buffer[] = new byte[1024];
            int len;
            while ((len=inputStream.read(buffer))!=-1)
            {
                String s = new String(buffer, 0, len);
                System.out.println(s);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {

            if(inputStream!=null)
            {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(accept!=null)
            {
                try {
                    accept.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(socket!=null)
            {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
